Internal Forces and External Forces

Show/Hide Sub-topics (Work, Energy and Power | A Level Physics)
  1. Isolated & non-isolated system
  2. Internal Forces and External Forces
  3. Energy
  4. Case Study 1: Energy Conversion for An Oscillating Ideal Pendulum
  5. Case Study 2: Energy Conversion for A Bouncing Ball
  6. Work
  7. Power


Internal Forces are forces between objects found inside the system.

  • cannot do work on system
  • cannot change total energy of the system

External forces are forces that act on the system and their agents are part of the environment.

  • can do work on system
  • can transfer energy into or out of system, thus changing the total energy of the system

Back To Work, Energy and Power (A Level Physics)

Back To A Level Physics Topic List



Mini Physics

As the Administrator of Mini Physics, I possess a BSc. (Hons) in Physics. I am committed to ensuring the accuracy and quality of the content on this site. If you encounter any inaccuracies or have suggestions for enhancements, I encourage you to contact us. Your support and feedback are invaluable to us. If you appreciate the resources available on this site, kindly consider recommending Mini Physics to your friends. Together, we can foster a community passionate about Physics and continuous learning.



Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.